Uhhhh i cant answer this without details
Multiply by two
2/5 x 2/1 = 4/5
The 8 in 782 is in the tens value.
Answer:
A = 1660 
Step-by-step explanation:
Area of the sail or a triangle is base times height
A =
(b x h)
Base is 40 ft (horizontal length)
Height is 83 ft (vertical height)
A =
(b x h)
A =
(40 x 83) =
(3320) = 1660 
Can you make the answer clearer. I would be glad to help you. I just don't understand where it says "the sum of three numbers is 16 the sum of twice the first number"